Wiper blade and wiper arm

ABSTRACT

A wiper blade for cleaning a vehicle windscreen having a carrier element configured to hold a wiper rubber is disclosed. A wiper blade adapter, fixed to the carrier element, is configured to detachably connect the wiper blade to a wiper arm. The wiper arm includes a wiper arm adapter disposed on the wiper arm that is oriented along a longitudinal extension of the wiper arm in an assembly direction. The wiper blade adapter includes a first adapter section attached to the carrier element, a second adapter section configured to directly connect to the wiper arm adapter, and indirectly connect to the wiper arm via the wiper arm adapter, a joint that articulates the first adapter section and the second adapter section, and an electrical connecting element having an electrical contact configured to reversibly establish an electrical connection between a heating element and a current supply disposed on the wiper arm.

The invention refers to a wiper blade according to the generic term ofpatent claim 1 and to a wiper arm according to the generic term of claim12.

Wiper blades for use in windscreen wiper modules for cleaningwindscreens on vehicles, particularly motor vehicles, are known invarious different embodiments. Wiper blades also designed as bow wiperblades (JP 10-329655) are particularly known in this case, which wareequipped with an electric heating element in the area of the wiperrubber or a wiping strip bearing the wiper rubber. The electricalconnection of the heating element to a connecting cable provided on thewiper arm side is established through an electric plug-socketconnection, consisting of a connecting element on a wiper blade adapteron the wiper blade side and a connecting element on a wiper arm enddesigned as a hook on the wiper arm side. The electrical connectingelements are arranged in such a manner in this case that on insertioninto and joining of the wiper blade adapter in wiper arm adapter, i.e.during the mechanical connection of the wiper blade to the wiper arm,the electrical connection is established at the same time. It isdisadvantageous that the electrical connection between the wiper arm andthe wiper blade is only realised with a single pole and consequentlycurrent flow over the wiper arm and the wiper arm in addition to thewiper blade adapter is necessary, which particularly in case ofcorrosion or malfunctions, results in heating of the wiper blade. It isfurthermore disadvantageous that on insertion into and joining of thewiper blade adapter in the wiper arm adapter formed by the hook-shapedend of the wiper arm, a reliable electrical connection is notguaranteed, particularly in case of manufacturing tolerances.

Electrically heated wiper blades likewise designed as bow wiper bladesare furthermore known (DE-GM 1 989 712), in which the electricalconnection of the heating element provided in the wiper blade isestablished through an external supply line equipped with a two-poleconnector and laid on the wiper arm and to be more precise, throughconnection of the connector to sockets provided on the side of the wiperblade body. The disadvantage with these known wiper blades is that inaddition to the mechanical connection between the wiper blade and thewiper arm, the electrical connection must be established separately andthat with the wiper blade installed, the plug connection between theexternal electrical supply line and the wiper blade is not onlyobjectionably in evidence, but there is also the risk that thiselectrical connection will be undesirably released during wipingoperation.

The purpose of the invention is to illustrate an electrically heatedwiper blade, preferably in the form of a so-called flat wiper blade anda so-called flat-bar wiper blade, in which in case of the mechanicalconnection to the wiper arm, the electrical connection to an externalelectrical supply line is at the same time reliably established and tobe more precise, independently of any tolerances due to manufactureand/or assembly.

In order to solve this problem, a wiper blade according to patent claim1 is developed. A wiper arm is the subject of patent claim 12.

A particularity of the invention lies in the fact that at least one ofthe two electrical connecting elements designed for mutual connection inan assembly directions i.e. the electrical connecting element on thewiper blade side and the electrical connecting element on the wiper armside, is provided to be floating and deflectable in a spatial planeoriented crossways in relation to the assembly direction, i.e. ismovable within certain limits. It is therefore sufficient if one of thetwo electrical connecting elements is provided to be floating anddeflectable and the relevant other, i.e. corresponding connectingelement is provided to be rigid and unmovable. In other words, thisother, i.e. corresponding electrical connecting element is designed forinteraction with an electrical connecting element which is held in afloating and deflectable fashion, i.e. movable to a certain extent, in aspatial plane oriented crossways to the assembly direction. Ultimately,the invention also comprises a configuration of this type in which bothelectrical connecting elements intended for interaction, i.e. both theelectrical connecting element on the wiper blade side and the electricalconnecting element on the wiper arm side, are floating and deflectablein. a spatial plane oriented crossways to the assembly direction.

A wiper blade adapter at least partially manufactured from plasticmaterial is advantageous, with the first adapter section fixed on thecarrier element of the wiper blade being manufactured as a moulding oras a punched and bent component made of metal and the second adaptersection being manufactured as a plastic moulding. The second adaptersection, which is articulated to the first adapter section by means ofan adapter joint, is designed for a positive-locking receptacle in thewiper arm adapter.

In specific cases, it may however be advantageous if the first andsecond adapter sections of the wiper blade adapter are manufactured fromplastic material.

Further developments, advantages and application possibilities of theinvention are also apparent from the following description of examplesof embodiment and from the figures. In this case, all thecharacteristics described and/or illustrated are in themselves or in anydesired combination fundamentally a subject of the invention, regardlessof their summary in the claims or their backward relation. The contentsof the claims are also made an integral part of the description.

The invention is described below in further detail in examples ofembodiment based on the figures:

FIG. 1 shows the wiper arm of a windscreen wiper module together with awiper blade fixed on this wiper arm according to the invention;

FIG. 2 and 3 show a partial representation of the wiper arm in FIG. 1,together with the wiper blade removed from the wiper arm in the area ofa wiper blade adapter;

FIG. 4 shows an enlarged representation of the wiper blade adapterprovided on the wiper blade;

FIG. 5 shows a perspective partial representation of the wiper blade,together with an element of the wiper blade adapter in addition to withthe electrical terminal or connecting element on the wiper blade side;

FIG. 6 to 9 show a cross-sectional representation of different variantsof so-called flat wiper blades and flat-bar wiper blades;

FIG. 10 shows a simplified representation of a cross-section along theline I-I of FIG. 4 in the area of the “floating” attachment of theelectrical connecting element on the wiper blade side on the wiper bladeadapter;

FIG. 11 shows a perspective partial representation of the wiper arm inFIG. 1 and in a view from below;

FIG. 12 shows the electrical connecting element on the wiper arm sidetogether with a retaining plate in a side view;

FIG. 13 shows a cross-section along the line II-II in FIG. 12;

FIG. 14 shows a cross-section along the line III-III in FIG. 12;

FIG. 15 and 16 show representations as in FIGS. 13 and 14 with a furtherform of embodiment of the invention.

In the figures, 1 denotes the wiper arm of a windscreen wiper module forvehicles, for example road vehicles, otherwise not illustrated infurther detail and 2 designates the wiper blade detachably connected toone end of the wiper arm 1 by means of a mechanical/electricalconnection. In the installed state, the wiper arm 1 is fixed at its enddistant from the wiper arm-wiper blade connection 3 and formed by abearing section 1.1 to a wiper shaft, not illustrated, of a likewise notillustrated windscreen wiper drive.

The wiper blade 2 represented in FIGS. 1-9 is therefore designed as aso-called flat wiper blade or flat-bar wiper blade. It presents in theknown manner a carrier element 6, extending over the entire length ofthe wiper blade 2, on which a wiper rubber 5 likewise extending over theentire length of the wiper blade 2 and manufactured from an elastomericplastic or rubber is held.

In FIGS. 2-7, the carrier element 6 is formed of two fiat spring rails6.1 made of spring steel, which are connected to each other in asuitable manner and part of the width of which engages in longitudinalgrooves on the side of the wiper rubber 5, with the other end of thewidth protruding laterally from the wiper rubber 5. For detachablefixing of the wiper blade 2, a wiper blade adapter 7 is provided on thelatter in the centre of the wiper blade or approximately in the centreof the wiper blade, designed in two sections and consisting of a firstadapter section 8 and a second adapter section 9, which are pivotallyconnected to one another by means of hinge bolt 10. The adapter section8 fixed in this case indirectly or directly to the carrier element 6 ofthe wiper arm 2 formed by the spring rails 6.1 and to be more precise,overlapping the wiper rubber 5 on its upper side facing away from thewiping lip 5.1 in the manner of a slide. For this purpose, the firstadapter section 8 consists of two essentially plate-like adapter sectionelements 8.1 in the embodiment presented, each of which is providedpositively overlapping on one long side of the wiper blade 2 a peripheryof a spring rail 6.1 at this position. The two adapter section elements8.1 are connected to each other by means of connecting elements, suchthat the carrier element 6 formed by two spring rails 6.1 is heldbetween the adapter section elements 8.1. The wiper rubber 5 heldbetween the spring rails 6.1 is provided here on its upper side with aspoiler 4 designed in a single piece with the wiper rubber. This is alsoapparent from FIG. 6, which shows a cross-section of a flat wiper bladein the area of the wiper blade adapter 7 and to be more precise, throughthe axis of the hinge bolt 10.

If is also possible for the spoiler 4 to be designed as a separatecomponent and to be fixed or held on the spring rails 6.1. Anarrangement of this type is apparent from FIG. 7, with a cross-sectionoutside the wiper blade adapter being shown in this case.

A flat wiper blade 2 may also be designed instead in such a manner thatthe carrier element 6 is an elongated, elastic, profile rail 6.2receiving the head section of the wiper rubber 5, with one or severalspring rails 6.1 made of metal or plastic material being arranged on orin the wiper rubber 5 and/or within the profile rail 6.2. The wiperblade adapter is mounted in such cases on the profile rail 6.2. On theupper side of the carrier element 6, a spoiler 4 connected in a singlepiece with the profile rail may be present, as is apparent from FIG. 8.Instead, as shown in FIG. 9, a separately manufactured spoiler 4 mayalso be mounted, preferably clipped in place, on the upper side of theprofile rail 6.2 forming the carrier element 6. The wiper blades may ofcourse be equipped in an intrinsically known manner with furthertechnical details, as implied for instance in FIG. 9 with fluid ducts4.1 and outlet orifices 4.2 for dispensing of washing fluid on to thewindscreen to be cleaned.

The first adapter section 8 is articulated to the second adapter section9 with a hinge bolt 10 and to be more precise such that a limitedoscillating movement of the adapter section 8 and therefore of the wiperblade 2 in relation to the adapter section 9 and relative to the wiperarm 1 with the wiper blade 2 fixed on the wiper arm 1 is possible and tobe more precise, around the axis of the hinge bolt 10, which is orientedvertically or transversally to a central plane of the wiper blade 2encompassing the wiping lip 5.1.

The wiper blade adapter 7 is a part of the detachable connection 3between the wiper blade 2 and the wiper arm with the wiper arm 1 beingprovided with or designed with, on its free end distant from the bearingsection 1.1, a wiper arm adapter 11 with a receiving opening or adapteropening 11.1. The adapter section 9 is insertable into the adapteropening 11.1 from the free end 1.2 of the wiper arm 1 in an assemblydirection and in the Z axis and indeed in such a manner that the adaptersection 9 is subsequently held positively and by catch engagement in theadapter opening 11.1. The first adapter section 8 of the wiper bladeadapter 7 and the hinge bolt 10 are made of metal and the second adaptersection 9 is manufactured as a plastic moulding.

For the positive-fitting arrangement of the second adapter section 9,the adapter opening 11.1 of the wiper arm 1 is formed of a U profilewith the two shanks 12 arranged parallel to and spaced apart from oneanother and of the yoke section 13 connecting them. On the free edgedistant from the yoke section 13, the shanks 12 are respectivelyprovided with angled portions 14 and 15, such that the adapter section9, after insertion in the adapter opening 11.1, is positively surroundedby the yoke section 13 and the shanks 12 on it top side and its two longsides running parallel or substantially to the longitudinal extension ofthe wiper blade 2 and is hereby precisely guided during joining.Furthermore, the angled portions 14 and 15 also positively engage behindthe adapter section 9 on its underside facing away from the adaptersection 8 and the wiper blade. On the upper side, the second adaptersection 9 is equipped with a projection 16 formed on a sprung tongue,which engages as a latching means in a recess 17 provided on the yokesection 13 after insertion of the adapter section 9 into the adapteropening 11.1, thereby securing the wiper blade adapter 7 on the wiperarm 1 by catch engagement.

As shown in particular by FIG. 11, the adapter opening 11.1 isfurthermore designed in such a manner that the U profile is open bothtowards the free end of the wiper arm and towards the wiper armunderside, which with the wiper arm 1 installed, faces towards thevehicle windscreen at least during wiping operation.

In order to prevent icing up of the wiper blade 2 and at the same timeof the tilting web connecting the wiping lip 5.1 to the remaining partof the wiper rubber 5 and/or of one or several spray ducts 4.1, whichare designed or provided in the superimposed spoiler section 4 (FIG. 9)or also in the wiper rubber or on the profile rail 6.2 and are equippedwith a large number of outlet orifices 4.2 for application of a washingand cleaning fluid to the vehicle windscreen, the wiper blade 2 isdesigned as an electrically heated wiper blade. At least one electricheating element is provided for this purpose in or on the wiper blade 2or however in the spray ducts 4.1. This heating element may present themost diverse realisations, for example in the form of a heating foil orhowever in the form of a heating filament. In the embodiment presentedin the figures, the heating element consists of a heating filament 18 ofthis kind.

In order during mechanical attachment of the wiper blade 2 to the wiperarm 1 to also simultaneously establish automatically, i.e. solely byinsertion of the adapter section 9 into the adapter opening 11.1, thenecessary electrical connection with the heating element or heatingfilament 18, the connection 3 is designed as a mechanical/electricalconnection and to be more precise, in addition to the elements alreadymentioned above effecting the mechanical connection with an electricalconnecting element 19 on the wiper blade side and a connecting element20 on the wiper arm side.

The two connecting elements 19 and 20 are respectively of two-poleexecution and to be more precise, in the embodiment presented, theconnecting element 19 is designed as a two-pole connector with thecontact pins 19.1 and the connecting element 20 with the contact sockets20.1. The two ends of the heating filament 18 are connected to theconnecting element 19 and to the contact pins 19.1. The ends of atwo-core electrical supply line 21 are connected to the connectingelement 20 and to the contact sockets 20.1 at that point, running alongthe wiper arm 1 on the underside of the latter and by means of which thebeatable wiper blade 2 is supplied with the necessary heating currentfrom the electrical system on the vehicle side. The lead 21 is held onthe underside of the wiper arm 1 with the aid of holders and clips 22.If specific designs or arrangements of the electrical heating elementsrequire this, the electrical connecting elements 19, 20 on the wiperblade side and wiper arm side can also be equipped with more than twopoles and contacts.

The electrical connecting elements 19 and 20 consist respectively of ahousing 23 and 24 manufactured as a plastic moulding. The housing 23 ofthe connecting element 19 on the wiper blade side is shaped in this casesuch as to form a sleeve-like or bush-like housing section 23.1, theopening 25 of which receives both contact pins 19.1. The opening 25 isopen on the front face of the housing section 23.1 adjacent to the freeend of the contact pins 19.1. Furthermore, the housing 23 forms ahousing section 23.2, with which the housing 23 is held on the adaptersection 9 and indeed such that the axis of the opening 25 and thereforealso the plug contacts parallel to this axis and spaced apart from oneanother are oriented in the in longitudinal direction of the wiper bladeand respectively parallel to the longitudinal direction of the wiperarm, i.e. in the direction of the Z axis.

For a better understanding of the explanations below, three spatial axesrespectively oriented vertically to one another are indicated, names theX axis, Y axis and Z axis, among which the X axis and the Y axis areoriented crossways and the Z axis is oriented parallel to thelongitudinal extension of the wiper blade 2 and the wiper arm 1, asillustrated in the respective figures. In the above definition of theorientation of the spatial axes, the fact was expressly disregarded thatthe second adapter section 9 is pivotable within certain limits inrelation to the first adapter section 8 fixed on the wiper blade carrierelement 6. The direction defined as the “assembly direction” inconnection with the invention runs in the direction of the spatial axisdesignated as the Z axis.

In the embodiment presented in FIGS. 2-5 and 10-14, the housing 23 ofthe connecting element 19 on the wiper blade side is maintained floatingon the second adapter section 9 and indeed such that to a limitedextent, a movement of the housing 23 and therefore the electricalconnecting element 19 is possible in the spatial plane crossways to theZ axis in relation to the second adapter section 9, as implied forexample in FIG. 3 by the double arrows running in the X axis and Y axis.The floating connection between the housing 23 and the adapter section 9is achieved for example by the fact that webs 9.1 moulded on the adaptersection 9 engage with a sufficient amount of play in recesses 23.2.1formed on the outer surface of the housing section 23.2. Otherpossibilities for the floating arrangement of the housing 23 are alsoconceivable, for example in the form of the housing 23 being held on theadapter section 9 by means of an elastic section or an elastic material23.3 and/or the housing 23 being manufactured at least on its housingsection 23.2 or however In its entirety from an elastic material, sothat the virtually floating arrangement or connection of the housing tothe adapter section 9 is achieved by means of the own elasticity of thehousing section 23.2.

The attachment of the housing 23 to the second adapter section 9 isfurthermore designed such that the open side of the opening 25 facesaway from the adapter section 9 and the housing protrudes over thenarrow side of the adapter section 9.

The housing 24 of the electrical connecting element 20 on the wiper armside consists of a housing section 24.1 in which the two contact sockets20.1 are received and indeed such that these contacts are exposed on afront face of the housing section 24.1 in order to receive or forinsertion of the contact pins 19.1. The housing section 24.1 is adjoinedby the housing section 24.2, with which the housing 24 is attached bycatch engagement on a retaining tab or on a retaining plate 26, whichfor its part is held on the wiper arm 1 in such a manner that thehousing 24 and therefore the electrical connecting element 20 on thewiper arm side is located within the adapter opening 11.1 and to be moreprecise, such that the front face of the housing section 24.1 presentingthe contact sockets 20.1 lies at a distance opposite the open side ofthe adapter opening 11.1 provided on the free end 1.2 of the wiper arm1, as illustrated in FIG. 11. The connection of the housing 24 to thewiper arm 1 by means of the retaining plate 26 is designed such that thehousing 24 and therefore the connecting element 20 on the wiper arm sideis provided as fixed or essentially fixed, i.e. not floating, in theadapter opening 11.1.

The housing section 24.2 is provided with a lateral widening 24.2.1 forthe locking connection of the housing 24 to the retaining plate 26,presenting a slit-like opening 27 adapted to the thickness and width ofthe retaining plate 26, with which the housing 24 is pushed on to oneend of the retaining plate 26 and is fixed at this position by catchengagement. The retaining plate 26 presents an opening 28 for thispurpose, in which a latch 29 formed on the widening 24.2.1 engages andlocks.

The housing section 24.1 is adapted on its outer surface to thecross-section of the opening 25, so that the housing section 24 can bepositively inserted into the opening 25 and in so doing, the plugcontacts 19.1 engage in the contact sockets 20.1, thereby establishingthe electrical connection between the electrical connecting elements 19and 20 and therefore between the heating element on the wiper blade sideand the connecting lead. As a result of the floating arrangement of theconnecting element 19 on the adapter section 9 and also the chamfer 30of the housing section 24.1 on its front face moving ahead duringinsertion into the opening 25, mutual alignment of the components to beconnected together occurs automatically. Consequently, easy and secureelectrical connection of the wiper blade 2 to the wiper arm 1 is alsoguaranteed by means of the mechanical/electrical connection 3simultaneously with mechanical connection.

The two electrical connecting elements 19 and 20 and their housings 23and 24 are designed and arranged such that after establishing themechanical and electrical connections, the transition between theconnecting elements 19 and 20 and the housings 23 and 24 is sealed,particularly against undesirable ingress of dirt and water and/ormoisture. This is of great importance since windscreen wiper modules aregenerally required to display a high level of functional safety underharsh external operating conditions. For sealing, the housing section24.1 is equipped with moulded on sealing ribs sealing the connectionarea between the housing sections at the transition to the housingsection 24.2 presenting an enlarged diameter.

It was assumed above that the electrical connecting element 19 on thewiper blade side is arranged to be floating and the connecting element20 on the wiper blade side is arranged to be non-floating or essentiallynon-floating and to be more precise, with a corresponding rigid designof the retaining plate 26.

FIGS. 15 and 16 illustrate in contrast an attachment of the electricalconnecting element 20 on the wiper arm side and the letter's housing insuch a manner that this connecting element is arranged to be floating oras far as possible floating on the wiper arm 1 or in the adapter opening11.1. The retaining plate 26 is designed for this purpose such that itacts in the manner of a leaf spring and thereby a floating attachment ofthe connecting element 20 and the housing 24 in an axial directionessentially vertical to the surface sides of the retaining plate 26 isachieved, i.e. in the direction of the X axis, as implied in FIG. 16 bythe double arrow oriented in the X axis. In this embodiment, the opening27 is realised in this case according to FIG. 15 such that it presents awidth in the Y axis which is somewhat greater than the width of thespring plate 26, so that mobility in the Y axis is also achieved for theattached housing 24, as implied in FIG. 12 by the double arrow in the Yaxis. The electrical connecting element 20 is therefore held floatingand indeed once again for easy connection of the electrical connectingelements 19 and 20 simultaneously with establishment of the mechanicalconnection between the wiper blade 2 and the wiper arm 1.

LIST OF REFERENCES

-   1 wiper arm-   1.1 joint support-   1.2 free end of wiper arms-   2 wiper blade-   3 mechanical/electrical connection arrangement-   4 spoiler-   4.1 fluid duct-   4.2 outlet orifice-   5 wiper rubber-   5.1 wiping lip-   6 carrier element-   6.1 spring rail-   6.2 profile rail-   7 wiper blade adapter-   8 first adapter section-   9 second adapter section-   8.1 adapter section element-   9.1 web-   9.2 elastic material-   10 hinge bolt-   11 wiper arm adapter-   11.1 adapter opening-   12 shank-   13 yoke section-   14, 15 angled portion-   16 protrusion-   17 opening-   18 heating filament-   19, 20 electrical connecting element-   19.1 contact pin-   20.1 contact socket-   21 electrical supply line-   22 attachment element-   23,24 housing-   23.1,23.2 housing section-   23.2.1 recess-   24.2.1 widening-   25 opening-   26 retaining plate-   27 opening-   28 opening-   30 bevel or chamfer-   X,Y,Z spatial axis

1-20. (canceled)
 21. A wiper blade for cleaning a vehicle windscreen,comprising: a carrier element configured to hold a wiper rubber, whereinthe wiper rubber comprises a wiping lip configured to directly contactthe vehicle windscreen, wherein the wiper blade is one selected from agroup consisting of a flat wiper blade and flat-bar wiper blade; a wiperblade adapter, fixed to the carrier element, that is configured todetachably connect the wiper blade to a wiper arm, wherein the wiperblade arm comprises a wiper arm adapter disposed on the wiper arm,wherein the wiper arm adapter is oriented along a longitudinal extensionof the wiper arm in an assembly direction, wherein the wiper bladeadapter comprises: a first adapter section attached to the carrierelement, a second adapter section, independent from the first adaptersection, configured to: directly connect to the wiper arm adapter, andindirectly connect to the wiper arm via the wiper arm adapter, a jointthat articulates the first adapter section and the second adaptersection, an electrical connecting element on a wiper blade side of thewiper blade adapter comprising: an electrical contact configured toreversibly establish an electrical connection between a heating elementand a current supply, wherein the current supply is disposed on thewiper arm, and a housing, wherein the electrical connecting element isconfigured for detachable connection to a second electrical connectingelement disposed on a wiper arm side of the wiper blade adapter, whereinthe detachable connection between the electrical connecting element andthe second electrical connecting element is formed along the assemblydirection, wherein the detachable connection is between the housing ofthe electrical connecting element arid the second electrical connectingelement, wherein the electrical connecting element is mounted to thewiper blade adapter, wherein the mounted electrical connecting elementis floating from the wiper blade adapter, wherein the mounted electricalconnecting element is deflectable in a spatial plane crossways inrelation to the assembly direction.
 22. The wiper blade according toclaim 21, wherein the housing comprising: a recess configured to receivea web of the wiper blade adapter.
 23. The wiper blade according to claim22, wherein a length of the recess is perpendicular to the assemblydirection.
 24. The wiper blade according to claim 22, wherein a width ofthe recess is larger than a second width of the web.
 25. The wiper bladeaccording to claim 22, wherein a depth of the recess is larger than asecond depth of the web.
 26. The wiper blade according to claim 22,wherein the housing further comprising: an elastic material disposed inthe recess, wherein the web directly contacts the elastic material,wherein the web does not contact the housing.
 27. A wiper arm for usewith a wiper blade, which is mechanically and detachably collectable tothe wiper arm and to a wiper arm adapter by joining in an assemblydirection using a wiper blade adapter, the wiper arm comprising: anelectrical connecting element disposed on a wiper arm side of the wiperblade adapter, configured to reversibly establish a connection to asecond electrical connecting element on a wiper blade side of the wiperblade adapter, wherein the connection between the electrical connectingelement and the second electrical connecting element is formed along theassembly direction, wherein the electrical connecting element and thesecond electrical connecting element are mounted floating, wherein theelectrical connecting element and the second electrical connectingelement are mounted deflectable in a spatial plane oriented crossways tothe assembly direction, wherein the connection between the electricalconnecting element and the second electrical connecting element isestablished when a detachable connection is made between the secondelectrical connecting element and a housing of the electrical connectingelement.
 28. The wiper arm according to claim 27, wherein the housingcomprising: a recess configured to receive a web of the wiper bladeadapter.
 29. The wiper arm according to claim 28, wherein a length ofthe recess is perpendicular to the assembly direction.
 30. The wiper armaccording to claim 28, wherein a width of the recess is larger than asecond width of the web.
 31. The wiper arm according to claim 28,wherein a depth of the recess is larger than a second depth of the web.32. The wiper arm according to claim 28, wherein the housing furthercomprising: an elastic material disposed in the recess, wherein the webdirectly contacts the elastic material, wherein the web does not contactthe housing.
 33. A vehicle windscreen wiping device, comprising; a wiperarm comprising: an electrical connecting element for supplying power,and a current supply, a wiper blade comprising: a carrier elementconfigured to hold a wiper rubber, and a heating element; a wiper bladeadapter, fixed to the carrier element, that is configured to detachablyconnect the wiper blade to a wiper arm, the wiper blade adaptercomprises: a second electrical connecting element on a wiper blade sideof the wiper blade adapter comprising: an electrical contact configuredto reversibly establish an electrical connection between the heatingelement and the current supply, and a housing; and a wiper arm adapterdisposed on the wiper arm, wherein the wiper arm adapter is orientedalong a longitudinal extension of the wiper arm in an assemblydirection, wherein the electrical connecting element is configured fordetachable connection to the second electrical connecting element,wherein the detachable connection between the electrical connectingelement and the second electrical connecting element is formed along theassembly direction, wherein the detachable connection is between thehousing of the second electrical connecting element and the electricalconnecting element, wherein the second electrical connecting element ismounted to the wiper blade adapter, wherein the mounted secondelectrical connecting element is floating from the wiper blade adapter,wherein the mounted second electrical connecting element is deflectablein a spatial plane crossways in relation to the assembly direction.